Promising sign.

STEPHEN M. DOWELL/ORLANDO SENTINEL

A rainbow appears over Daytona International Speedway as 200,000 waited for the race to start after heavy rains swept through the area Saturday. The start of the Pepsi 400 was delayed by the thunderstorms, and at the time of the rainbow, officials were trying to dry the track in hopes of starting the race.

A rainbow appears over Daytona International Speedway as 200,000 waited for the race to start after heavy rains swept through the area Saturday. The start of the Pepsi 400 was delayed by the thunderstorms, and at the time of the rainbow, officials were trying to dry the track in hopes of starting the race. (STEPHEN M. DOWELL/ORLANDO SENTINEL)

A rainbow appears over Daytona International Speedway as 200,000 waited for the race to start after heavy rains swept through the area Saturday. The start of the Pepsi 400 was delayed by the thunderstorms, and at the time of the rainbow, officials were trying to dry the track in hopes of starting the race.